CVE-2023-6232
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedBuffer overflow in the Address Book username process in authentication of Mobile Device Function of Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the network segment to trigger the affected product being unresponsive or to execute arbitrary code.*: Satera LBP670C Series/Satera MF750C Series firmware v03.07 and earlier sold in Japan. Color imageCLASS LBP674C/Color imageCLASS X LBP1333C/Color imageCLASS MF750C Series/Color imageCLASS X MF1333C Series firmware v03.07 and earlier sold in US. i-SENSYS LBP673Cdw/C1333P/i-SENSYS MF750C Series/C1333i Series firmware v03.07 and earlier sold in Europe.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceBuffer overflow vulnerability in the Address Book username processing during authentication in the Mobile Device Function on Canon multifunction printers and laser printers. A network-adjacent attacker can exploit this to cause device unavailability or potentially achieve arbitrary code execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 03.07<= 03.07<= 03.07<= 03.07<= 03.07<= 03.07<= 03.07<= 03.07CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify device model and firmware versionAccess the printer's web management interface (usually via IP address) and navigate to the Device Information or Settings page to view the firmware version. Alternatively, check via SNMP or the Canon PRINT Business app if available.Affected if Firmware version is 03.07 or lower for any of these models: MF755cdw, MF753cdw, MF751cdw, LBP674c, LBP672c, LBP671c, MF1238 II, MF1333c
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Verify Mobile Device Function is enabledIn the printer web interface, go to Network Settings or Mobile/Cloud settings and check if the Mobile Device Function (or Mobile Printing feature) is turned ON.Affected if Mobile Device Function is enabled - this is the feature where the vulnerable Address Book username processing occurs during authentication
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Confirm Address Book authentication is configuredCheck if the Address Book or user authentication feature is configured on the device, typically found under Address Book settings or User Authentication in the management interface.Affected if Address Book with user authentication is set up, as the vulnerability is in the username processing during authentication through this function
Device is affected if it is one of the listed models running firmware version 03.07 or lower AND has the Mobile Device Function enabled with Address Book authentication configured.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedUpdate affected device firmware to v03.08 or later. Additionally, restrict network access to printer management interfaces and isolate printer segments to limit attack surface.
Firmware v03.08 or later (specific to your model)
- 1. Identify the exact model number of your Canon printer (e.g., MF755cdw, MF753cdw, LBP674c, etc.)
- 2. Determine your Canon regional support site based on your location (Japan: canon.jp, US: usa.canon.com, Europe: canon-europe.com)
- 3. Navigate to the support/drivers section for your specific printer model
- 4. Locate and download the firmware update. Ensure the version is v03.08 or later (v03.07 and earlier are vulnerable)
- 5. Access the printer's web interface by entering its IP address in a web browser
- 6. Log into the printer administration panel with administrator credentials
- 7. Navigate to the Firmware Update or Maintenance section
- 8. Upload the downloaded firmware file and initiate the update
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing8.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2023-6232 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-6232 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data